Today, Amazon shipped an update for your Kindle 2 (and for the DX and The Kindle 2 International). It adds PDF support. With reflow. This is awesome and obsoletes a big part of what I was trying to do with savory.
Now for the bad news. It looks like today's firmware update locks down your device such that it will only take signed firmware updates. I'm sure some enterprising haxx0r over at mobileread.com will homebrew up an alternate version of the updater that doesn't screw you over. But you might want to leave your wireless turned off if the latest update hasn't already been pushed on you.